Earth grew by the accretion of meteoritic material. High-precision isotopic data reveal how the composition of this material changed over time, forcing revision of models of our planet's formation. See Letters p.521 & p.525
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Carlson, R. Earth's building blocks. Nature 541, 468–469 (2017). https://doi.org/10.1038/541468a
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DOI: https://doi.org/10.1038/541468a
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